Oes to the smith



(No Model.)

R. B. OWEN & 0. B. FULLER.

GIRGULATING HOT WATER HEATER.

N0. 363,165b Patented May17,1887.

UNITED Srrns RUSSEL B. OXVEN AND OLNEY B. FULLER, OF DETROIT, MICHIGAN,ASSIGN- OBS TO THE SMITH 82 OWVEN HEATER COMPANY, OF SAME PLACE.

CIRCULATING HOT-WATER HEATER.

SPECIF C ION forming part of Letters Patent No. 363,165, dated May 17,1887.

Application filed May 10, 1886.

To all whom it may concern:

Be it known that we, RUssEL B. OWEN and OLNEY B. FULLER, of Detroit, inthe county of Wayne and State of Michigan, having invented new anduseful Improvements in Girculating Hot-Tater Heaters; and we do herebydeclare that the following is a full, clear, and eXact descriptionthereof, reference being had to the accompanying drawing which forms toa part of this specification.

This invention relates to certain new and useful improvements incirculating hot-water heaters; and it consists in the peculiarcombinations and the novel construction and arrange- 5 ment of parts,all as more fully hereinafter described and claimed.

In the accompanying drawing. our inven tion is shown in sectionalelevation, and A represents a boiler consisting of a double shellsurrounding and inclosing an annular waterspace, a. V

F is a vertical or direct pipe, communicating with the water space ofthe boiler near its top and leading to a coil or radiator, G, whence it2 5 descends, following the pipe H, which leadsinto the water-space ofthe boiler near its lower end.

0 is a feed-pipe, forming a communication between an elevated tank, D,and the lower part of the water-space of the boiler, prefer- 3o ably,although not necessarily,through a 'F at the lowerend of thereturn'pipe, as shown at I).

E is an overflow-pipe from the tank.

I is a water-supply pipe discharging into said tank,and provided with avalve, 0, which 5 is operated by means of the float J, secured at theend of the arm d, the other end of which is connected with the valve.

In practice, the boiler, circulating pi pcs, and feedpipe being filledwith cold water, and

o the tank filled to the top of the overflow-pipe, a fire is made in thefurnace. As Water under certain conditions of heat expands, suchexpansion will force a small portion of the water in the feed-pipe todischarge into'the tank and 5 out of the same through its overflow-pipe.If a smallquantity of hot water is new wanted Serial No. 201,672. (Nomodel.)

for any purpose, it may be obtained by opening the cock K in thereturn-pipe I-I. \Vhat is withdrawn will be immediately supplied fromthe tank through the feed-pipe, the weight of the column of water insuch pipe being sufficient to overcome the pressure in the boiler. Thislowers the surface of the water in the tank below the top of theoverflow, and the float, following the falling surface, opens the valvein the supply-pipe and lets the water therefrom fill the tank again tothe proper height. If from any cause a leak or obstruction should befound in the circulating-pipes, the water may be withdrawn from suchpipes by closing the valve 6 in the vertical pipe F and the valve h inthe return-pipe H and opening the cock K in the latter-named pipe,thereby avoiding the necessity of drawing off the water in the boiler,as has heretofore bee required.

Some of the features herein shown, but not claimed, are shown andclaimed in an application tiled of even date herewith by Peter Smith andOlney B. Fuller, and numbered 201,670.

What We claim as our invention is The apparatus described, consisting ofthe nected with said water-space near the top thereof, direct pipes F,communicating with said tank, independent coils G, return-pipe H,connected with the bottom of the water-space, elevated tank D, feed pipe0, connecting said tank with the lower part of the water-space, thereturn-pipe H, connected at b with the feed'pipe O, overflow-pipe E,feed-pipe I to said tank, valve 0 in said feedpipe, float J, regulatingsaid valve, the cock 0 in the direct pipe F, valve h in the return-pipe,and the cock K in the return-pipe between the valves 0 and h, allcombined, arranged,and operating substantially as and'for the purposesspecified.

RUSSEL B. OWEN. OLNEY B. FULLER. WVitnesses:

H. S. Srnaeun, CHARLES J. HUNT.

boiler A, having water-space a, a tank con

